starts with ground beef, unions, and peppers baked in a ketchup glaze with savory gravy and mashed russet potatoes. what makes stouffer's meatloaf best of all? that moment you enjoy it at home. stouffer's. let's fix dinner. >>> this tragedy in newtown, connecticut has already ignited a national conversation about guns, as we have just seen. but how about the other half of this? mental illness. think of the component it's been in all the serious gun crimes we have covered. 1 in 17 americans lives with a serious mental illness, that's according to the government, and their symptoms range in severity, of course. but fewer than a third of them receive treatment. we have asked our chief medical editor dr. nancy snyderman to join us again to talk about this. it is the other component in all those cases we know about because of the name of the place. >> it is. and just think of it, brian, columbine, virginia tech, you start to see a pattern. and what is that pattern? anger, loneliness, social awkwardness, and, of course, access to guns. and the number that brian referenced, 1 out of 17, undersco